Thirty-five metres underground is Madrid's best kept secret, ninety tons of gold and other treasures of incalculable wealth, protected by extraordinary security measures (armoured doors, moat, unbreachable security system...) Nobody has ever tried to enter inside. Not even La Gata - chief suspect in several of the most incredible heists ever carried out and now retired in Italy - has even thought of trying. But circumstances have changed: one of her old gang has been murdered and the others are in danger. Everything points to betrayal, and unfinished business.. La Gata will be forced to marshal her team and confront the shadows of her past. But for this she will need the help of an old man nobody had counted on, and who has been planning his revenge for 70 years ... Two parallel stories in time, with the same ending today.